I've tried rolling my clothes, but it never seemed to make much difference. The shower thing I mentioned works wonders, though.
For those of us who travel a lot, I have a request. While you're in line for security, have your boarding pass and ID out and ready to go. Put all your metal in your coat, and take your coat off. Wear shoes that come off easily, or untie them while in line. Unzip your laptop case, and have the laptop easily and quickly removable.
Security is the slowest part of the process, and primarily because people aren't organized and ready.